Revert perf tweak to AggregateTestGroup
Revert perf tweak to AggregateTestGroup

bowlofstew/changes,wfxiang08/changes,wfxiang08/changes,wfxiang08/changes,bowlofstew/changes,dropbox/changes,dropbox/changes,dropbox/changes,bowlofstew/changes,bowlofstew/changes,dropbox/changes,wfxiang08/changes